CVE-2026-104592 osmocom CVE debrief

Who should care

Defenders responsible for systems using libosmocore, particularly those handling GSM CBSP messages, should assess exposure and prioritize patching to prevent potential denial of service. Defenders should review system configurations for potential exposure and monitor for unusual activity related to GSM CBSP messages. The vulnerability allows remote attackers to cause a denial of service, and its impact is significant in systems handling GSM CBSP messages.

Why it matters

CVE-2026-104592 is a denial of service vulnerability in libosmocore that defenders should prioritize patching, particularly in systems handling GSM CBSP messages.

• Potential denial of service in systems handling GSM CBSP messages
• Need to verify and apply patches for libosmocore
• Importance of monitoring for unusual activity related to GSM CBSP messages

Technical summary

The CBSP WRITE-REPLACE decoder in libosmocore through 1.14.1 contains an out-of-bounds read vulnerability. This allows remote attackers to cause a denial of service. The vulnerability affects systems handling GSM CBSP messages, particularly those using libosmocore. Defenders should prioritize verifying and applying patches for libosmocore to prevent potential denial of service. The vulnerability has a significant impact on systems handling GSM CBSP messages, and defenders should review system configurations for potential exposure.

Defensive priority

Defenders should prioritize verifying and applying patches for libosmocore, particularly in systems handling GSM CBSP messages.

Recommended defensive actions

• Verify and apply patches for libosmocore
• Review system configurations for potential exposure
• Monitor for unusual activity related to GSM CBSP messages
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on affected systems and exploitation is limited. Defenders should verify and apply patches for libosmocore, review system configurations for potential exposure, and monitor for unusual activity related to GSM CBSP messages. The vulnerability allows remote attackers to cause a denial of service, and its impact is significant in systems handling GSM CBSP messages.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.